Fix _impl::TableFriend::insert_column_unless_exists(), make it able to accept temporary LinkTargetInfo oebject.
Fix _impl::TableFriend::insert_column_unless_exists(), make it able to accept temporary LinkTargetInfo oebject.

realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core